Go to GameStop! I got mine there for ten dollars about three or four years ago, so it might be cheaper if you find it!
There is no NPC who you can trade a Haunter to for a Gengar in Pokemon Crystal. To get Gengar you will need to trade with another player or a copy of Pokemon Gold, Silver or Crystal.
Ask someone with a copy of Red/Blue/Yellow/Gold/Silver/Crystal to trade with you. Have them trade any Pokemon with you, and then trade the now-evolved Machamp back to you.
In Pokemon Crystal.
What the hell is a Pokemon crystal
You can't get Moltres in Pokemon Crystal, Only in Pokemon Leafgreen and Pokemon Firered. Including Pokemon Platinum.
There is no NPC who you can trade a Haunter to for a Gengar in Pokemon Crystal. To get Gengar you will need to trade with another player or a copy of Pokemon Gold, Silver or Crystal.
saffron, below the train station, upstairs
There are no legal versions of Pokemon Crystal for anything other than Gamenoy Color. You cannot find a legal copy for Game Boy Advance.
Ask someone with a copy of Red/Blue/Yellow/Gold/Silver/Crystal to trade with you. Have them trade any Pokemon with you, and then trade the now-evolved Machamp back to you.
The only way to get a Mewtwo in Pokmeon Crystal is to trade with a copy of Red, Blue, or Yellow through the Time Machine in Pokemon Centers.
You can't find it in the wild, you need to transfer one from a copy of Blue/Red.
You can't without a cheating device, or a copy of Gold, Silver, Crystal, or any of their remakes.
I preference pokemon crystal
There is no HM08 in Pokemon Crystal. Pokemon Crystal has only 7 HMs that are available to use.
In Pokemon Crystal.
liquid crystal? do you mean Pokemon crystal if its Pokemon crystal the levels are 19 20 and 23
What the hell is a Pokemon crystal